Electric converter



(No Model.)

W. STANLEY,-Jr. ELECTRIG CONVERTER.

. No. 496,212. Patented Apr.-25, 1893.]-

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UNITED STATES PATENT OEEIcE.

WVILLIAM STANLEY, J R., OF GREAT BARRINGTON, MASSACHUSETTS, ASSIGNOR,

BY MESNE ASSIGNMENTS, TO THE WESTINGHOUSE ELECTRIC AND MANU- FACTURINGCOMPANY, OF 'PI'ITSBURG, PENNSYLVANIA.

ELECTRIC CONVERTER.

SPECIFICATION forming part of Letters Patent No. 496,212, dated April25, 1893.

Original application filed October 1, 1887, Serial No. 251,173. Dividedand this application filed April 1, 1889. Serial No. 305,531. (Nomodel.)

To all whom it may concern.-

Be it known that 1, WILLIAM STANLEY, J r., a citizen of the UnitedStates, residing at Great Barrington, in the county of Berkshire andState of Massachusetts, have invented certain new and usefulImprovements in Electric Converters, (Case No. 300,) of which thefollowing is a specification.

The invention relates to the construction of IO apparatus employed fortransforming alternating, pulsatory, or intermittent primary electriccurrents, into alternating secondary orinduced currents. Devices forthis purpose are technically termed inductoriums, transformers orconverters.

In carrying out the invention primary and secondary coils of insulatedwire are wound upon a laminated core of inductive material. Currentstraversing one of the coils induce in the core rapid changes in magneticcondition, and these changes in turn induce currents in the other coils.The iron may be conveniently arranged in the general form of a Grammering, the wire being wound through the cen- 2 5 ter and betweenprojecting teeth. After the Wire is applied, an outer casing oflaminated iron is placed outside the coils and ring, and another tubesimilarly constructed is inserted within the ring.

The invention will be described in detail in connection with theaccompanying drawings, in which-- Figure 1 is a transverse section andFig. 2 a vertical section of a converter, embodying 3 5 the principlesof the invention.

Referring to the figures, A represents the core of the converter, and Pthe primary coil, and S the secondary coil. The core is made up of threeportions a, a and a The por- 0 tion a is composed of thin plates 1), bof magnetizable material, which may be stamped out. These plates areinsulated from each other sufficiently to prevent the circulation ofFoucault currents and have inner projections or teeth 0, and outerprojections c at convenient distances from each other. The coils P and Sare wound in the spaces between these projections. The plates areseparated from each other preferably by plates or sheets of paperorother insulating material as shown at 0, such insulation being merelysuficient to prevent the circulation of Foucault currents in a mannerwell understood.

The primary and secondary coils are wound in the spaces between theprojections and they may be superposed upon each other or placed side byside as found desirable. After the coils are wound, the inner tube a isapplied. This is built up of annular laminae of iron as shown and itmakes magnetic contact with the inner teeth 0'. The outer cylinder a isin like manner built up of insulated laminze of soft iron, and itincases the coils making magnetic contact with the outer teeth 0 Thelaminae of the several sections a, a and a may be bound together bylongitudinal bolts 6', e, e e 6 6 In this manner magnetic circuits arecompleted about the several sections of the coil. The coils, it will beobserved, are thus completely surrounded by laminated iron. Instead ofemploying all the sections of the coils in the spaces between the teetha portion only may be used, that is to say a section such as is embracedbetween the dotted lines in Fig. 1. The core then consists of a centralportion of H-shaped crosssection, the ends of the corresponding armsbeing closed about the coils by magnetizable material.

This application is a division of an appli- 8o cation filed by me,October 1, 1887, Serial No. 251,173.

I claim as my invention- 1. The combination with the primary andsecondary coils of a converter, of a core composed of annular laminae ofmagnetizable material, having inner and outer teeth, the coils beingarranged between the teeth upon the core, and laminae of soft ironclosing the openings between the teeth outside of the coil, 0substantially as described.

2. An electric converter consisting of insulated laminae of soft iron,annular in form, having inner and outer teeth, coils wound between theteeth, and a soft iron cylindrical core closing the teeth about thecoils.

3. A secondary generator or transformer of alternating currents ofelectric energy, said transformer consisting of primary and secondaryconductors, an outer iron sheathing, and a magnetic iron core, havinganumber of channels for the primary and secondary conductors, and formingwith the sheathing independent short magnetic circuits, whereby eachdivision of the magnetic iron portion with its sections of. primary andsecondary conductors constitutes an independent small secondarygenerator, any number of which may be connected up to form avgeneratoror transformer.

4; A core for electric converters composed of laminze of soft ironinsulated from each other, annular in form, and having inner and outerteeth, and two laminated oy1inders,one within and the other inclosingthe core, substantially as described.

In testimony whereof I have hereunto subscribed my name this 26th day ofMarch, A. D. 1889.

WVILLIAM STANLEY, JR.

Witnesses:

FRANK H. WRIGHT, LEWIS K. JENKINS.

